:root{
    --mist:#F4FAFC;--white:#FFFFFF;--soft:#E7F3F6;--title:#0E3A46;--text:#24505A;
    --muted:#4A7380;--aux:#7A9AA4;--sea:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;
    --pale:#D7EEF2;--line:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);
    --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--mist);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden}
a{color:var(--deep);text-decoration:none}
a:hover{color:var(--sea)}
button,a{outline:none}
a:focus-visible,button:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
button{font:inherit}
.site-head{position:fixed;z-index:50;left:0;right:0;top:0}
.mist-line{height:20px;background:var(--title);color:#fff;font-size:12px}
.mist-inner,.pier-inner,.shell-inner{width:min(calc(100% - 32px),var(--max));margin:0 auto}
.mist-inner{height:20px;display:flex;align-items:center;justify-content:space-between}
.head-search{height:20px;border:0;background:transparent;color:#fff;padding:0 6px;cursor:pointer}
.pier-bar{height:62px;background:#fff;border-bottom:1px solid var(--line)}
.pier-inner{height:62px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}
.brand-lockup{justify-self:start;display:flex;align-items:center;min-height:44px}
.brand-logo{max-height:36px;max-width:190px;object-fit:contain}
.brand-fallback{font-weight:800;color:var(--title);font-size:22px;letter-spacing:.04em}
.drawer-button,.app-link,.btn-primary,.btn-secondary,.text-button{min-height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;font-weight:700;cursor:pointer}
.drawer-button{justify-self:center;border:1px solid var(--line);background:var(--soft);color:var(--deep)}
.app-link{justify-self:end;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}
.app-link:hover,.btn-primary:hover{color:#fff;filter:brightness(1.03)}
.shell-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--line)}
.shell-inner{height:42px;display:flex;align-items:center;gap:8px}
.shell-inner a{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:8px;color:var(--deep);font-size:14px;font-weight:700}
.shell-inner a.is-active{background:var(--sea);color:#fff}
.site-main{padding-top:124px;min-height:60vh}
.page-wrap{width:min(calc(100% - 32px),var(--max));margin:0 auto}
.hero{padding:34px 0 14px}
.eyebrow{margin:0 0 6px;color:var(--sea);font-weight:800;letter-spacing:.08em;font-size:13px}
h1,h2,h3{color:var(--title);line-height:1.35}
h1{font-size:clamp(28px,4vw,32px);margin:0 0 14px}
h2{font-size:23px;margin:0 0 12px}
h3{font-size:18px;margin:0 0 8px}
.lead{font-size:17px;max-width:820px;color:var(--muted);margin:0}
.section{padding:28px 0}
.section + .section{border-top:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px}
.section-head p{margin:0;max-width:620px;color:var(--muted)}
.card,.article-panel,.step-card,.pebble-card,.index-card,.note-row,.faq-item{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px}
.grid-2,.grid-3,.grid-4{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card,.article-panel,.step-card,.pebble-card,.index-card{padding:22px}
.card p,.article-panel p,.step-card p,.pebble-card p,.index-card p{margin:0;color:var(--text)}
.card a,.step-card a,.index-card a{font-weight:800}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.btn-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}
.btn-secondary{background:#fff;color:var(--deep);border:1px solid var(--line)}
.text-button{padding:0 6px;min-height:44px;color:var(--sea)}
.media-slot{margin:0;border:1px solid var(--line);background:var(--soft);border-radius:18px;overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:190px}
.media-slot img{width:100%;height:100%;max-height:240px;object-fit:contain;object-position:center}
.media-slot.hero-media{max-height:300px;min-height:220px;background:var(--pale)}
.media-slot.hero-media img{max-height:300px}
.media-slot.app-media{min-height:300px}
.media-slot.app-media img{max-height:420px;width:auto}
.media-fallback{min-height:inherit;width:100%;display:flex;align-items:center;justify-content:center;padding:28px;text-align:center;color:var(--deep);font-weight:800;background:linear-gradient(135deg,#fff 0%,var(--pale) 100%)}
.home-hero-copy{text-align:left;padding:20px 0 6px}
.home-hero-copy .lead{max-width:760px}
.stair-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.step-card{min-height:152px;position:relative;overflow:hidden}
.step-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--bright)}
.step-card:nth-child(even)::before{background:var(--deep)}
.number-list{display:grid;gap:10px}
.number-item{display:grid;grid-template-columns:58px 1fr;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line)}
.number-item:last-child{border-bottom:0}
.number-item .num{color:var(--sea);font-size:20px;font-weight:900}
.pebble-card{border-radius:18px}
.pebble-card .media-slot{margin:-8px -8px 16px;min-height:180px}
.split-media{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(300px,.92fr);gap:22px;align-items:center}
.album-list{display:grid;gap:12px}
.album-row{display:grid;grid-template-columns:88px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}
.album-row .folio{font-size:13px;font-weight:900;color:var(--sea);letter-spacing:.08em}
.gallery-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.gallery-strip article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px}
.gallery-strip .media-slot{min-height:150px;margin-bottom:10px}
.inline-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.inline-links a{display:inline-flex;min-height:44px;align-items:center;padding:0 14px;background:var(--soft);border:1px solid var(--line);border-radius:10px;font-weight:800}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:28px;align-items:start}
.article-stack{display:grid;gap:20px}
.article-panel p + p{margin-top:12px}
.article-panel ul{margin:8px 0 0;padding-left:1.2em}
.article-panel li+li{margin-top:7px}
.side-note{position:sticky;top:142px;background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:20px;color:var(--deep)}
.side-note h2{font-size:17px}
.side-note a{display:block;padding:8px 0;border-bottom:1px solid var(--line);font-weight:700}
.side-note a:last-child{border-bottom:0}
.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.note-list{display:grid;gap:12px}
.note-row{padding:18px 20px}
.note-row strong{display:block;color:var(--title);margin-bottom:6px}
.timeline{display:grid;gap:16px}
.timeline .article-panel{position:relative;padding-left:54px}
.timeline .article-panel::before{content:attr(data-step);position:absolute;left:18px;top:20px;width:26px;height:26px;border-radius:8px;background:var(--sea);color:#fff;display:grid;place-items:center;font-weight:900;font-size:12px}
.faq-list{display:grid;gap:14px}
.faq-item{padding:20px}
.faq-item h2{font-size:18px}
.faq-item p{margin:0}
.callout{padding:20px;border-radius:16px;background:var(--pale);color:var(--deep);border:1px solid var(--line)}
.callout strong{color:var(--title)}
.site-footer{background:var(--title);color:#D4E8EC;margin-top:54px;padding:44px 0 calc(34px + env(safe-area-inset-bottom))}
.footer-inner{width:min(calc(100% - 32px),var(--max));margin:0 auto}
.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:26px}
.footer-logo{max-height:34px;max-width:180px;object-fit:contain}
.footer-brand strong{color:#fff;display:block;font-size:20px}
.footer-brand span{display:block;font-size:12px;letter-spacing:.12em}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.footer-grid h2{color:#fff;font-size:15px}
.footer-grid a{display:block;color:#D4E8EC;padding:5px 0}
.footer-grid a:hover{color:#fff}
.footer-note{margin:28px 0 8px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}
.copyright{margin:0;color:#AFCBD1;font-size:13px}
.screen-mask{position:fixed;inset:0;z-index:70;background:rgba(14,58,70,.36);opacity:0;visibility:hidden;pointer-events:none;transition:.22s}
.screen-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}
.tide-drawer{position:fixed;z-index:80;right:0;top:0;bottom:0;width:min(410px,86vw);background:var(--mist);transform:translateX(104%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s;padding:20px;overflow-y:auto;box-shadow:-18px 0 38px rgba(14,58,70,.12)}
.tide-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}
.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.drawer-brand{display:flex;align-items:center;gap:10px}
.drawer-brand img{max-height:30px;max-width:150px;object-fit:contain}
.drawer-brand strong{display:block;color:var(--title)}
.drawer-brand span{font-size:11px;color:var(--muted);letter-spacing:.12em}
.icon-button{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--deep);cursor:pointer}
.wave-groups{display:grid;gap:14px}
.wave-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:16px}
.wave-card h2{font-size:15px;margin-bottom:8px}
.wave-card a{display:grid;grid-template-columns:92px 1fr;gap:8px;padding:9px 0;border-bottom:1px solid var(--line)}
.wave-card a:last-child{border-bottom:0}
.wave-card strong{color:var(--title)}
.wave-card span{font-size:13px;color:var(--muted)}
.search-layer{position:fixed;z-index:85;left:0;right:0;top:82px;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}
.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}
.search-card{width:min(calc(100% - 32px),760px);margin:0 auto;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 18px 18px;padding:22px}
.search-head{display:flex;justify-content:space-between;align-items:center;gap:14px}
.search-head h2{font-size:20px}
.search-look{min-height:58px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--soft);border-radius:12px;padding:0 16px;color:var(--muted)}
.search-look p{margin:0}
.search-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.search-links a{min-height:44px;display:grid;place-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;font-weight:800}
.overlay-open{overflow:hidden}
.mobile-bottom{display:none}
@media (max-width:900px){
    .grid-4,.stair-grid,.gallery-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
    .article-layout{grid-template-columns:1fr}
    .side-note{position:static}
    .split-media{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:680px){
    body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}
    .mist-inner,.pier-inner,.page-wrap,.footer-inner,.shell-inner{width:calc(100% - 32px)}
    .pier-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}
    .brand-logo{max-width:118px;max-height:30px}
    .brand-fallback{font-size:18px;white-space:nowrap}
    .drawer-button,.app-link{padding:0 10px;font-size:13px}
    .shell-tabs{display:none}
    .site-main{padding-top:82px}
    .hero{padding-top:24px}
    .grid-2,.grid-3,.grid-4,.stair-grid,.index-list,.gallery-strip{grid-template-columns:1fr}
    .section-head{display:block}
    .section-head p{margin-top:6px}
    .media-slot.hero-media{min-height:190px}
    .search-layer{top:82px}
    .search-card{width:calc(100% - 20px);background:var(--soft);border-radius:0 0 16px 16px}
    .search-links{grid-template-columns:repeat(2,minmax(0,1fr))}
    .mobile-bottom{position:fixed;z-index:60;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line)}
    .mobile-bottom a{display:grid;place-items:center;min-width:0;color:var(--deep);font-size:13px;font-weight:800}
    .mobile-bottom a.is-active{background:var(--sea);color:#fff}
    .site-footer{margin-bottom:0;padding-bottom:34px}
    .wave-card a{grid-template-columns:78px 1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:410px){
    .brand-fallback{font-size:16px}
    .drawer-button,.app-link{padding:0 8px;font-size:12px}
    .footer-grid{grid-template-columns:1fr}
}